Block data for Solana
In Solana Squid SDK, the data is processed by repeatedly calling the user-defined batch handler function on batches of on-chain data. The sole argument of the batch handler is its context ctx
, and ctx.blocks
is an array of Block
objects containing the data to be processed, aligned at the block level.
For SolanaBatchProcessor
the Block
interface is defined as follows:
export interface Block<F extends FieldSelection = {}> {
header: BlockHeader<F>;
instructions: Instruction<F>[];
transactions: Transaction<F>[];
logs: LogMessage<F>[];
balances: Balance<F>[];
tokenBalances: TokenBalance<F>[];
rewards: Reward<F>[];
}
F
here is the type of the argument of the setFields()
processor method.
BlockData.header
contains the block header data. The rest of the fields are iterables containing the six kinds of blockchain data. Canonical ordering within each iterable depends on the data kind:
transactions
are ordered in the same way as they are within blocks;instructions
follow the order of transactions that gave rise to them;tokenBalances
are ordered in a deterministic but otherwise unspecified way.
The exact fields available in each data item type are inferred from the setFields()
call argument. They are documented on the field selection page: